Check the listing for details. Lettuce Fertilizer 8-15-36 + Micros 1 Pound - Makes 200 Gallons Hydroponics. Condition: New. Listed at 24.99 USD. Greenway Biotech's specially formulated lettuce fertilizer is blended to provide a balanced ratio of nitrogen, potassium and phosphorous to your hydroponic lettuce crop. Also included in our specialty fertilizer is an ample supply of chelated micronutrients, ensuring your that your heads of lettuce are bright green, full and delicious. Simply apply our hydroponic lettuce fertilizer and watch in amazement as your plants' beautiful heads of lettuce! Lettuce Fertilizer is suitable for:KaleMicrogreensBroccoliCollard GreensSpinachCabbageBeet GreensWatercressLettuceSwiss ChardArugulaEndiveBoy ChoyTurnip Greens All of our specialty fertilizers are free of harmful chemicals and heavy metals and 100% safe for the environment.